Hot-air conduit



Apr. 17, 1923. 1,451,887

- J. NOVAK 1 HOT AIR CONDUIT Filed Aug.v 10 1920 1 2 Ill* Eig Patented Apr. l'u, i923.

ltl'hllllhlid y JOSEPH NOVAK, OF CLEVELAND, l, ASSIGNR T0 THE HENRY FURNCE .AND

FOUNDRY COVIPANY, GF CLEVELAND, OHIO.

HOT-AIR CONDUIT.

application filed August 10, 19:20.` SeralNo. 402,584.

To all whom t may concern.'

Be it lrnown that l, JosnrH Novas, a citizen oi the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and uset'ul Improvements in Hot-Air Conduits7 ot which the following is a specification. u

This invention relates to improvements in hot air conduits, the present invention relating more particularly to that class or type of conduits which are particularly designed and adapted for use in connection withhot air furnaces above the :tiret iioor line in conducting and distributing hot air to the various rooms to be heated, the improved conduit being adapted to be arranged or disposed within the side walls of the various rooms or compartments of the building.

The present improvements relate particularly to improvedcoupling means tor conduit sections for connecting and locking the adjacent or jointed ends of the conduit sections or units whereby when said conduit sections are assembled and connected together the same will be securely retained and locked in position to prevent the accidental loosening or openingot the joint.

The primary ob]l ect of the invention is to provide a generally improved coupling or lock of this class which will be iefzceedingly simple in construction, cheap of manufacture, and erflicient in use.

l/Vith the above mentioned and other ends in View, my invention consists in the novel construction, arrangement, and combination of parts, 'hereinafter described, illustrated in one of its embodiments in the accompanying drawings, and particularly pointed out in the appended claims.

Referring to the drawings forming a part of this specification, .Figure l is Jfragmentary disassembled view of the upper and v lower marginal edges of two conduit sections embodying the improved coupling tongue and recess members preparatory to being assembled or coupled together.

Fig. Q, a view of the same in assembled or nested position preparatory to being locked by the coupling tongue members.

Fig. 3, a view ot the same in assembled locked position.

Fig. 4, a fragmentary top edge view of one of the conduit sections taken on line elf-fi of Fig. l and illustrating` in particular the coupling recess member for receivy n ing the tongue coupling member'.

Fig. 5, a similar view ot the lower marginal edge of a. conduit section equipped with the coupling tongue member and taken substantially on line 5 5 of Fig. l.

Fig. 6, a sec-tional view of the coupled and locked conduit sections taken on line 6 6 ot Fig. 3. l

Fig. 7, a view of a pair of assembled and locked conduit sections equipped with p air orV coupling members in locked position.

Similar numerals ci? reference ldesignate like parts thruout all the figures of the drawings.

The conduit unit or section comprises the usual inner and outer walls l and. 2, respectively, connected `to and spaced from each other, in the present instance, by means of upper and lower wall spacing members 3 and 4, respectively. ln the present instance, the upper wall spacing member' 3, is formed of a separate piece terminating in wall receiving flanges 3 and 3b, taking over and receiving the upper marginal edges y of the outer wall 2, and inner wall l, respectively. It will be seen that the front' marginal edge ot the upper wall 'spacing member 3, forms a double walled overlapping marginal portion 2b, receiving the underlapping lower marginal Portion 2c, of a superposed conduit section. said underlapping lower marginal portion 2C, being slightly inset as will appear on reference to Fig. 6 of the drawings. rlhe wall spacing members 3 and 4, Lare provided with the usual air openings or ports 5, for the circulation of air within the air insulating space' between the inner and outer walls.

Referring now to the improved coupling and locking members t which this invention particularly relates, it will be seen that the overlapping marginal portion 2", isV provided with a` struck out recess or opening 2d, formed by an upwardly and inwardly extending guide 2e. l

The lower underlapping` marginal portion 2C, is provided with tongues 2f, formed by means ot a pair of notched recesses or slots 2g.

he slits or recesses 2g, extend substantially parallel with each other., and the tongues may be inclined slightly outwardly as indicated in Fig, 5` of the drawings.

The struck out tongue and recess coupling members may be arranged at suitable intervals on opposite marginal edges or sides ot the conduit sections, but under ordinary circumstances where the conduit is or' ordinary width a single set of coupling members on the front and rear sides will -be suilicient, but it desired a pair of such coupling devices may be vused on the front and rear sides as indicated in Fig. 7 ot' the drawings. In the act of building up or nesting the conduit sections, it will be apparent that as a superposed section is placed in position as indicated in Fig. 2 of the drawings the inwardly and upwardly extending guides 2e, will engage the l'ree ends oi the depending .tongues 2f, and as the section is pressed downwardly the tongues will be directed outwardly7 and after the section is fully seatedv it may be locked in position by turning the tongues up asshown in Figs. 3, 6 and 7 ot the drawings.

Having thus described one of the embodiments of the invention, what l claim and desire to secure by Letters Patent, isi- 1. In a 'coupling for conduit sections, a conduit section having its under and overlapping marginal edges provided with struck out tongue and recess members, re- 'spectively7 to receive and interlock with similar members of adjacent conduit sections, said recess members being provided with inner tongue guides.

2. A coupling for conduit sections, comprising a conduit section having its overlapping marginal edges provided with struck out tongue and recess members, said recess members having inwardly struck 11p-- wardly extending tongue receiving guides and Vsaid tongue members beingv arranged within the vertical planes of said guides to enter and be guided by the latter in assembling and being cut from ping marginal edge.

3. A coupling for conduit sections, comprising' a conduit section having its yunder and overlapping marginal edges' provided with struck out tongue and recess members, respectiveli/J7 said recess members having tongue receiving guides spaced from the edge of the overlapping member, and said tongue members being arranged to engage and be directed outwardly by said guides and being cut from the lower edges oi' said underlapping marginal edge and turned up to lock the sections in position.

li. in a hot air conduit, a conduit section having its lower and upper marginal edges provided with tongue and recess members.l respectively, said tongue members being` each Yformed by a pair' of slits cut fromn the lower the underlapmarginal edgey thereof, and said recess members being formed by inwardly struck upwardly extending guides struck from the upper marginal edges thereof and spaced below the same to receive and direct the free ends of said tongues outwardly into said recess members when assembling. Y

5. ln a hot air conduit', a conduit section having its under and overlapping marginal edges provided with tongue and recess mem-- bers. respectively, said tongue members being each *formed by slits cut from the underlapping marginal edge thereoi', andsaid recess members being `formed by upwardly extending tongue guides struck from the overlapping marginal edges tliereof and spacedl below the same to receive and direct the upturned i'ree ends ot said tongues outwardly into said recesses whereby the latter may be turned over tor locking the sections in assembled position.

ln testimony whereotl I have affixed my JOSEPH NOVAK.

signature. 

